Nervous System
What two parts make up the central nervous system?
Brain and spinal cord
What hormone lowers blood glucose?
Insulin
What is the plant hormone involved in growth?
Auxin
What hormone causes ovulation?
LH (Luteinising Hormone)
What is reaction time measured in?
Milliseconds (ms)
Which system is faster: nervous or endocrine?
Nervous system
What type of neurone carries impulses from the CNS to effectors?
Motor neurone
Where is insulin produced?
Pancreas
What is phototropism?
Growth in response to light
What hormone maintains the uterus lining?
Progesterone
Name one factor that affects reaction time.
Age / fatigue / drugs / caffeine (any one)
What is a hormone?
A chemical messenger
What is the gap between two neurones called?
Synapse
What hormone raises blood glucose?
Glucagon
Which direction do roots grow in gravitropism?
Downwards (towards the Earth)
What does FSH stand for?
Follicle Stimulating Hormone
What is the purpose of a reflex?
To protect the body from harm
What is the main difference between a reflex and a conscious action?
Reflex is automatic; conscious is voluntary
What is the role of the sensory neurone?
Carries impulses from receptors to the CNS
What is the effect of glucagon on the liver?
It causes the liver to convert glycogen into glucose
What part of the plant detects light?
Tip of the shoot
What is the purpose of IVF?
To help people have a baby
What is the effector in a reflex arc?
Muscle or gland
What is the role of the pituitary gland?
Releases hormones that control other glands
What is the order of structures in a reflex arc?
Receptor → sensory neurone → relay neurone → motor neurone → effector
What type of feedback loop controls blood glucose levels?
Negative feedback
What does the hormone Ethene control in plants?
Ripening of fruit. Makes fruit ripen faster.
Name two hormones used in IVF.
FSH and LH
What is the function of a synapse?
Transfers signal between neurones using chemicals
Name one ethical issue with IVF.
Embryo selection / unused embryos / cost (any one)